How to use iCloud Keychain to manage passwords on your iPhone or iPad - TechRepublic

iCloud Keychain serves as a basic password manager for your iPhone and iPad. Through Keychain, you can save passwords for websites and apps and then retrieve them when you need to sign back into those sites and apps. Your credentials are stored and synced in an encrypted format through iCloud, so you can use the same ones across an iPhone, iPad, and Mac. You can also edit and manage your saved passwords. You can change a password through Keychain and delete accounts you no longer need.
https://www.techrepublic.com/article/how-to-use-icloud-keychain-to-manage-passwords-on-your-iphone-or-ipad/